Diamonds, emeralds, sapphires and other eye-popping gemstones are up for grabs this week at Christie’s and Sotheby’s two-day binge of jewelry auctions in Geneva. Christie’s leads off today, featuring ...

An engagement ring is not just a decoration—it’s a token of love, devotion, and the beginning of an eternal bond. Choosing the proper shape of the diamond in an engagement ring is a serious issue ...

FIRST LET’S GET it out of the way. The baguette—the long, lean, rectangular cut of diamond—has little in common with the long, lean, crisp-crusted French loaf of the same name. The word is derived ...